../ dmsp_15_ephemeris_20111204.txt 22-Jun-2023 00:18 109434 dmsp_16_ephemeris_20111204.txt 22-Jun-2023 00:18 109273 dmsp_17_ephemeris_20111204.txt 22-Jun-2023 00:18 109355 dmsp_18_ephemeris_20111204.txt 22-Jun-2023 00:18 109327